Wrench



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ARCHIBALD MURRAY, OF TROY, NEV YORK.

WRENCH.

Specification of Letters Patent No. 19,790, dated March 30, 1858.

To all whom it may concern.'

Be it known that I, ARCHIBALD MURRAY, of the city of Troy, in the countyof Rensselaer and State of New York, have invented an ImprovedAdjustable Vrench; and I do hereby declare that the following is a full,clear, and exact description of the same, reference being hadto theannexed drawings, making a part of this specification, in which- Figuresl and 2 are plans of the wrench when set for use; Fig. 3 a plan of thesame when the movable jaw is free to be set in any required position;Fig. L a perspective view of the fixed jaw and the stock; Fig. 5 aperspective -view of the movable jaw; and Fig. 6 a perspective view ofthe ring or collar by which the movable jaw is secured to the shank orstock of the fixed one.

The same letters refer to like parts -in all the figures.

The product of my invention is an adjustable wrench of very convenientform for use, andstrong and durable, and which can be manufactured at avery cheap rate; the same consisting, independently of a wooden handle,Z, which may or may not be aflixed, of three separate pieces, A, B, O,each of which may be cast of metal, without the use of a core incasting, and at once slipped together, without any further labor, tomake the wrench ready for market or use.

The part or casting A, shown separate in Fig. 4, consists of the fixedjaw, a, and its shank or stock, b, with an extension, c, upon which awooden handle, Z, may be fixed, or which may be cast larger to fit thehand of the user. The piece or casting, B, seen distinct in Fig. 5,consists of the movable ,jaw Z and its shank e. The part C, seenseparate in Fig. 6, is a simple ring or collar of such size as to justfit around and slide upon the larger portions of the shanks Z9, c, whenput together as shown in Figs. l and 2. I generally make it slightlytapering, casting it without the use of a separate core. I prefer tocast the parts A, B and O of iron and make them malleable.

The shanks o, e, are cast with teeth, f, f, upon their inner or adjacentand opposite faces; which teeth fit together, as shown by the drawings,when the jaws are at various distances apart; and prevent the shank e,when set for use, from being slid upon the fixed one, Z9, either toward,or from, the fixed jaw, a; and thereby prevent the ring O, which holdsthe shanks together, from becoming disagreeably set or stuck fast, uponthe shanks when a powerful strain is put upon the parts in turningscrews or nuts. The tongues g, g, and grooves, h, L, upon the shanks fittogether and prevent the movable jaw from turning sidewise upon thefixed shank while the wrench is in use.

Instead of casting the shanks with the rack-teeth f, f, and thelongitudinal tongues g, g, and grooves, h, L, in the particular mannershown in the drawings, the inner faces of the shanks may have any kindof shallow teeth which will both allow the jaws to be set at variousdistances apart and pre vent the movable jaw from turning sidewise orsliding endwise when held to the fixed shank by the ring orcollar O.

A portion, z', of the movable shank e, Figs. l, 3 and 5, or of thefixedone, Z), Fig. 2, or of both of the shanks, is madeV of such smallersize than the other portion that when the ring or collar is around suchsmaller parts the movable jaw can be disengaged from the fixed shank, asseen by Fig. 3, and set in any required position allowed by the teeth ofthe shanks. The projection, j, keeps the movable jaw from falling outwhen the ring is left opposite to the smaller part of the shanks.

Now, my improved adjustable wrench can be distinguished from every otherheretofore produced by the fact that it is essential to my wrench thatthe shanks with their jaws should be held together in every directionand with Athe jaws at various distances apart by means of a ring orcollar which surrounds and slides upon both shanks together, aided bysuitable teeth upon the .inner sides of the shanks, and that some partof one or both of the shanks over which the ring can be slid should belreduced in size next to the ring to allow the jaws to be disengaged andreset at various distances apart, substantially as hereinbeforedescribed and shown by the annexed drawings. But the form of the threeessential pieces or castings which constitute my improved wrench may ofcourse be Varied Without destroying the features which characterize inyinvention.

What I elailn as my invention and desire to secure by Letters Patent is-My improved adjustable Wrench, in which the movable j aw is fastened tothe Xed one by means of a ring or collarwhich surrounds and slides uponthe Shanks of both jaws together, substantially as herein described.

ARCHIBALD MURRAY.

-Witnesses JOHN MORAN, A. F. PARK.

